What is the Zeitwerk and Why Does it ExistA. Lange & Söhne built its post-reunification identity on a specific formal language: asymmetric dials, radial layouts, three-quarter plates in German silver, outsize date windows positioned with architectural deliberateness. The Lange 1, the Datograph, the Saxonia, each one legible as a Lange from across a room. The Zeitwerk, introduced at SIHH 2009, reads completely different: massive numerals in jumping-disc windows, a subsidiary seconds register, and a dial architecture unlike anything every seen before. It is the brand's most formally radical modern watch and, not coincidentally, perhaps its most technically demanding. Understanding why Lange built it, and why it works the way it does, makes the reference-by-reference differences legible in a way that spec comparisons alone cannot.